[2005] Improving speed of WMI calls

[lallous]

Hello everyone,

I am still learning how to integrate wmi into vb.net,
I was able today to write a program which can retrieve installed software from a remote computer. The issue is that the process took over 30 seconds which is some how high.
Is there any technique to improve this ?

Thank you
Best Regards

[jmcilhinney]

It's hard to make code better if you haven't seen the code.

[lallous]

It's hard to make code better if you haven't seen the code.

Sorry for that, the program is still very simple and i am using it for testing.
The program should retrieve the list of installed software.

Imports System.Management

Module Module1

    Sub Main()
        Dim myconnectionoptions As New System.Management.ConnectionOptions
        With myconnectionoptions
            .Impersonation = ImpersonationLevel.Impersonate
            .Authentication = AuthenticationLevel.Packet
        End With

      
        Dim managementscope As System.Management.ManagementScope

        managementscope = New System.Management.ManagementScope("\\192.168.1.3\root\cimv2", myconnectionoptions)
        managementscope.Connect()

        If managementscope.IsConnected = True Then
            Console.WriteLine("Connection Established")
           
        Else
            Console.WriteLine("COULD NOT CONNECT")
        End If

 
        Dim myobjectsearcher As System.Management.ManagementObjectSearcher
        Dim mycollection As System.Management.ManagementObjectCollection
        Dim myobject As System.Management.ManagementObject
        myobjectsearcher = New System.Management.ManagementObjectSearcher(managementscope.Path.ToString, "Select * from Win32_Product") 'Win32_Product
        mycollection = myobjectsearcher.Get

        For Each myobject In mycollection
            Console.WriteLine(myobject.GetPropertyValue("Caption"))
        
        Next

        Console.ReadLine()

    End Sub

End Module

Thanks

[jmcilhinney]

You should step through the code one line at a time and see what parts take a long time. You can also time each step and output the results to the Output window or a log file or whatever. You can't always fix code by looking at it. Just like a machine you have to run it and analyse its performance in action.

[lallous]

The part taking the most time is when you query the machine for the installed software. So I think u mean its not the code that is slow but the querying process and retrieving the data..
I tried to query a machine with 30+ programs so maybe thats why it took sometime.
Thanks jmcilhinney.